Water Elemental Composition and Toxicity in Kazakhstan’s Transboundary Rivers

Central Asian Journal of Water Research Pub Date : 1900-01-01 DOI:10.29258/cajwr/2023-r1.v9-1/19-32.eng

M. Severinenko, V. Solodukhin, S. Lennik, G. Kabirova, D. Zheltov, A. Bychenko

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引用次数: 1

Abstract

The article describes the monitoring results of the content of chemical elements (As, Cr, B, Ba, Li, Mo, Pb, Sb, Sr, U, and Cr) in the water of transboundary rivers of Kazakhstan (Shagan, Ural (kaz. Zhayik), Ilek, Tobol, Ayat, Irtysh (kaz. Yertys), Emel, Ili (kaz. Ile), Tekes, Shu, Kara-Balta, Talas, and Syr Darya) conducted in 2020. The toxic element concentrations underwent comparison with background levels (Clark[e] numbers) and maximum permissible concentrations (MPC), with sub-sequent calculation of the total toxicity index (KHL). The study showed that practically all the inves-tigated rivers were subject to contamination, with uranium and lithium as the greatest contributors to surface water toxicity. The rivers in Southern and South-Eastern Kazakhstan – namely, the Kara-Balta, Syr Darya and Shu – were found to be most exposed. For instance, the KHL of the Kara-Balta River water exceeded the permissible threshold by over 5.9 times. The lowest KHL value (<1) corre-sponded to the Yertys and Ile Rivers. The research made it possible to identify the toxicity of trans-boundary waters flowing into the territory of Kazakhstan, as well as provided basis for further in-vestigation to identify pollution sources.

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哈萨克斯坦跨界河流的水元素组成和毒性

本文介绍了哈萨克斯坦(沙干、乌拉尔)跨界河流水中化学元素(As、Cr、B、Ba、Li、Mo、Pb、Sb、Sr、U、Cr)含量的监测结果。扎伊克、伊勒克、托博尔、阿亚特、伊尔提斯。Yertys)， Emel, Ili (kaz)。Ile)、Tekes、Shu、Kara-Balta、Talas和Syr Darya)于2020年进行了试验。将有毒元素浓度与背景水平(Clark[e] number)和最大允许浓度(MPC)进行比较，随后计算总毒性指数(KHL)。研究表明，几乎所有被调查的河流都受到污染，铀和锂是地表水毒性的最大贡献者。哈萨克斯坦南部和东南部的河流——即卡拉-巴尔塔河、锡尔河和舒河——被发现受污染最严重。例如，卡拉-巴尔塔河水的KHL超过了允许的阈值的5.9倍以上。最低KHL值(<1)对应于Yertys河和Ile河。这项研究使查明流入哈萨克斯坦境内的跨界水的毒性成为可能，并为进一步调查查明污染源提供了基础。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Central Asian Journal of Water Research

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